Effect of nitrogen fertilization on photosynthesis rate, nitrogenous metabolites and α- and β-asarone accumulation in triploidAcorus calamus L. leaves

Abstract

The effects of urea fertilization (1 g/l) on the photosynthetic rate and α- and β-asarone accumulation in the leaves of a clonal triploid of Acorus calamus L. were investigated. Urea addition significantly increased (up to ca. 50%) the photosynthesis rate vs. incident light (Photosynthetic Photon Flux Density), chlorophylls and carotenoids, proteins and amino nitrogen contents. Urea application significantly increased the tyrosine and β-asarone contents (ca. 30%) but it decreased those of phenylalanine and α-asarone. © 1998 John Wiley & Sons, Ltd.